【举例】Android自定义Dialog——选择一个RadioButton

1. 自定义Dialog的界面

<--!dialog_selectserver.xml--><?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:id="@+id/rootView"    android:layout_width="match_parent"    android:layout_height="wrap_content"    android:background="@drawable/mydiabg"    android:orientation="vertical">    <TextView        android:id="@+id/groupnameet"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:layout_gravity="center_horizontal"        android:layout_marginTop="10dp"        android:text="选择服务器\n"        android:textColor="@color/blue"        android:textSize="25sp" />    <View        android:layout_width="match_parent"        android:layout_height="1dp"        android:layout_marginBottom="10dp"        android:background="@color/lightgrey"        android:padding="20dp" />    <RadioGroup        android:id="@+id/selectserver_radiogrp"        android:layout_width="match_parent"        android:layout_height="wrap_content"        android:gravity="center_horizontal">        <RadioButton            android:id="@+id/labserver_radiobtn"            android:layout_width="wrap_content"            android:layout_height="wrap_content"            android:text="实验室服务器"            android:textColor="@color/black"            android:textSize="18dp">        </RadioButton>        <RadioButton            android:id="@+id/aliyunserver_radiobtn"            android:layout_width="wrap_content"            android:layout_height="wrap_content"            android:text="阿里云服务器"            android:textColor="@color/black"            android:textSize="18dp"></RadioButton>    </RadioGroup>    <TextView        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:text="\n" /></LinearLayout>

2. Dialog的形状背景等设置

<--!diabg_bkg.xml--><?xml version="1.0" encoding="utf-8"?><shape xmlns:android="http://schemas.android.com/apk/res/android"    android:shape="rectangle">    <solid android:color="@android:color/white" />    <corners android:radius="16dp" /></shape>

3. 关于该Dialog的Java类文件

import android.app.Dialog;import android.content.Context;import android.view.LayoutInflater;import android.view.Menu;import android.view.View;import android.view.Window;import android.view.WindowManager;import android.widget.RadioGroup;/** * Created by guan on 3/13/17. */public class ServerSettingDialog extends Dialog {    RadioGroup selectserver_radiogrp;    DialogCallback callback;    //这里定义了一些关于该Dialog的一些选项    public enum SelectedServer {Lab, Aliyun}    //构造函数    public ServerSettingDialog(Context context) {        super(context, R.style.Dialog_Dim);        setCustomeDialog();        //==========对Dialog窗体大小的设置========        //设置dialog的宽度        WindowManager.LayoutParams lp = getWindow().getAttributes();        lp.width = (int) (AppConstant.SCRRENWIDTH * 0.8); //设置宽度        getWindow().setAttributes(lp);        //getWindow().setLayout((int) (AppConstant.SCRRENWIDTH * 0.8), (int) (AppConstant.SCREENHEIGHT * 0.3));    }    //构造函数    public ServerSettingDialog(Context context, int themeResId) {        super(context, themeResId);        setCustomeDialog();        //getWindow().setLayout((int) (AppConstant.SCRRENWIDTH * 0.8), (int) (AppConstant.SCREENHEIGHT * 0.3));    }    //构造函数    protected ServerSettingDialog(Context context, boolean cancelable, OnCancelListener cancelListener) {        super(context, cancelable, cancelListener);        setCustomeDialog();        //getWindow().setLayout((int) (AppConstant.SCRRENWIDTH * 0.8), (int) (AppConstant.SCREENHEIGHT * 0.3));    }    public void setDialogCallback(DialogCallback callback) {        this.callback = callback;    }    //具体设置该Dialog    private void setCustomeDialog() {        View mView = LayoutInflater.from(getContext()).inflate(R.layout.dialog_selectserver, null);        selectserver_radiogrp = (RadioGroup) mView.findViewById(R.id.selectserver_radiogrp);        //这一部分代码表示具体要做的事.....        selectserver_radiogrp.setOnCheckedChangeListener(new RadioGroup.OnCheckedChangeListener() {            @Override            public void onCheckedChanged(RadioGroup group, int checkedId) {                switch (checkedId) {                    case R.id.labserver_radiobtn:                        callback.onClickRadioButton(SelectedServer.Lab);                        break;                    case R.id.aliyunserver_radiobtn:                        callback.onClickRadioButton(SelectedServer.Aliyun);                        break;                }                ServerSettingDialog.this.dismiss();            }        });        super.setContentView(mView);    }    //自定义的，关于该Dialog的回调接口    public interface DialogCallback {        void onClickRadioButton(SelectedServer s);    }}

4. 使用Dialog

                ServerSettingDialog dialog = new ServerSettingDialog(mContext);                dialog.setCanceledOnTouchOutside(true);//触摸dialog以外的区域，dialog会消失                //设置Dialog的回调函数                dialog.setDialogCallback(new ServerSettingDialog.DialogCallback() {                    //根据不同的选择，做出不同的动作                    @Override                    public void onClickRadioButton(ServerSettingDialog.SelectedServer s) {                        if (s == ServerSettingDialog.SelectedServer.Lab) {                            //balabala                        } else if (s == ServerSettingDialog.SelectedServer.Aliyun) {                            //balabala                        }                    }                });                //添加Dialog消失时的listener                dialog.setOnDismissListener(new DialogInterface.OnDismissListener() {                    @Override                    public void onDismiss(DialogInterface dialog) {                        showSelectedServerOnActivity();                    }                });                //显示该Dialog，不要忘记                dialog.show();

抓住Demo一只：

为了方便以后调用，本人已经将上述Dialog封装到了.aar文件中。以后调用时，只需要导入第三方包即可。

https://github.com/shanxu100/GUtils

欢迎大家补充交流。